A review on health risk assessment of PM in the construction industry - Current situation and future directions.

Particulate matter (PM) is one of the primary pollutants of the environment. The amount of PM discharged from construction projects is considerably high; it generates 70-80% of the overall PM. The composition of PM is complex and may contain various toxic substances that have severe health effects on human health. Existing health risk assessment in the construction industry lacks the efficiency to reduce the risk level of PM exposure. This study systematically reviews literature in this research area to understand the primary reasons which generates PM health risk assessments. The authors reviewed health risk assessment studies in the construction industry to analyze the current situation, and then reviewed health risk assessment studies from four different industries to compare the advancement of research and outcomes in all the five industries. From the study it is understood that the area of research related to ambient air were more developed compared to those in other areas due to their sampling methods and the size of the PM studied. From the findings of the systematic review, it is understood that majority of the risk assessment studies still rely on a two decade-old system and neglect recent research findings pertaining inhalation rate and size of PM. To overcome this, the level of risk involved in various common construction activities needs to be explored using real-time location-based PM monitoring and real-time inhalation monitoring methods. The findings of this review will help researchers gain a better perspective while conducting occupational health risk studies in the construction industry.